Residual Effects of Lime- and Clay-Amended Biosolids Applied to Coarse-Textured Pasture Soil

Table 7

Soil pH in ryegrass cycles 6 and 7 with reapplied LaBC^® (+/−) as influenced by residual effects of soil amendments from previous management history.

Soil pH
Soil management history; (cycles 1 to 5)	Ryegrass cycle 6		Ryegrass cycle 7
	Current treatment (+/−LaBC^®)
	−LaBC^®	+LaBC^® (50 t ha^−1)	Treatment; −LaBC^® from cycle 6	Treatment; +LaBC^® from cycle 6
Control	5.0 ± 0.03^d	6.6 ± 0.06^b	4.9 ± 0^e	7.1 ± 0.09^b
^aLaBC^®	5.4 ± 0.00^c	6.8 ± 0.06^a	5.4 ± 0.03^c	7.4 ± 0.07^a
^bFertiliser	4.7 ± 0.03^e	6.5 ± 0.12^b	4.6 ± 0.03^f	7.1 ± 0.06^b
LaBC^® + fertiliser	5.3 ± 0.07^c	6.9 ± 0.09^a	5.2 ± 0.06^d	7.2 ± 0.06^b

LaBC^® = 50 t ha⁻¹ of wet weight equivalent.
^bFertiliser = macronutrient fertilisers (N, P, K, Ca, and Mg) applied according to district practice.
Values are mean ± SE (). The letters followed by mean ± SE were based on LSD ().
The main and interaction effects of treatments with the same letters, within the same column and between columns within each cycle, respectively, were not significant (), based on 2-way ANOVA.